<!DOCTYPE html>
<html lang="en">
	<head>
		<title>three.js webgpu - cubemap mix</title>
		<meta charset="utf-8">
		<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
		<link type="text/css" rel="stylesheet" href="main.css">
	</head>
	<body>

		<div id="info">
			<a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> - Mix Two CubeMaps<br />
			Battle Damaged Sci-fi Helmet by
			<a href="https://sketchfab.com/theblueturtle_" target="_blank" rel="noopener">theblueturtle_</a><br />
		</div>

		<!-- Import maps polyfill -->
		<!-- Remove this when import maps will be widely supported -->
		<script async src="https://unpkg.com/es-module-shims@1.3.6/dist/es-module-shims.js"></script>

		<script type="importmap">
			{
				"imports": {
					"three": "../build/three.module.js",
					"three/addons/": "./jsm/",
					"three/nodes": "./jsm/nodes/Nodes.js"
				}
			}
		</script>

		<script type="module">

			import * as THREE from 'three';
			import * as Nodes from 'three/nodes';

			import { mix, oscSine, timerLocal, cubeTexture, context, float } from 'three/nodes';

			import WebGPU from 'three/addons/capabilities/WebGPU.js';
			import WebGPURenderer from 'three/addons/renderers/webgpu/WebGPURenderer.js';

			import { RGBMLoader } from 'three/addons/loaders/RGBMLoader.js';

			import { OrbitControls } from 'three/addons/controls/OrbitControls.js';
			import { GLTFLoader } from 'three/addons/loaders/GLTFLoader.js';

			let camera, scene, renderer;

			init();

			function init() {

				if ( WebGPU.isAvailable() === false ) {

					document.body.appendChild( WebGPU.getErrorMessage() );

					throw new Error( 'No WebGPU support' );

				}

				const container = document.createElement( 'div' );
				document.body.appendChild( container );

				camera = new THREE.PerspectiveCamera( 45, window.innerWidth / window.innerHeight, 0.25, 20 );
				camera.position.set( - 1.8, 0.6, 2.7 );

				scene = new THREE.Scene();

				const rgbmUrls = [ 'px.png', 'nx.png', 'py.png', 'ny.png', 'pz.png', 'nz.png' ];
				const cube1Texture = new RGBMLoader()
					.setMaxRange( 16 )
					.setPath( './textures/cube/pisaRGBM16/' )
					.loadCubemap( rgbmUrls );

				cube1Texture.generateMipmaps = true;
				cube1Texture.minFilter = THREE.LinearMipmapLinearFilter;

				const cube2Urls = [ 'dark-s_px.jpg', 'dark-s_nx.jpg', 'dark-s_py.jpg', 'dark-s_ny.jpg', 'dark-s_pz.jpg', 'dark-s_nz.jpg' ];
				const cube2Texture = new THREE.CubeTextureLoader()
					.setPath( './textures/cube/MilkyWay/' )
					.load( cube2Urls );

				cube2Texture.generateMipmaps = true;
				cube2Texture.minFilter = THREE.LinearMipmapLinearFilter;

				scene.environmentNode = mix( cubeTexture( cube2Texture ), cubeTexture( cube1Texture ), oscSine( timerLocal( .1 ) ) );

				scene.backgroundNode = context( scene.environmentNode, {
					getSamplerLevelNode: () => float( 1 )
				} );

				const loader = new GLTFLoader().setPath( 'models/gltf/DamagedHelmet/glTF/' );
				loader.load( 'DamagedHelmet.gltf', function ( gltf ) {

					scene.add( gltf.scene );

				} );

				renderer = new WebGPURenderer();

				renderer.setPixelRatio( window.devicePixelRatio );
				renderer.setSize( window.innerWidth, window.innerHeight );
				renderer.toneMappingNode = new Nodes.ToneMappingNode( THREE.LinearToneMapping, 1 );
				renderer.outputEncoding = THREE.sRGBEncoding;
				renderer.setAnimationLoop( render );
				container.appendChild( renderer.domElement );

				const controls = new OrbitControls( camera, renderer.domElement );
				controls.minDistance = 2;
				controls.maxDistance = 10;

				window.addEventListener( 'resize', onWindowResize );

			}

			function onWindowResize() {

				camera.aspect = window.innerWidth / window.innerHeight;
				camera.updateProjectionMatrix();

				renderer.setSize( window.innerWidth, window.innerHeight );

			}

			//

			function render() {

				renderer.render( scene, camera );

			}

		</script>

	</body>
</html>
